Table 2.
Change in alcohol-related outcomes from baseline to 3-month follow-up (Wilcoxon signed-rank tests for max drinks and negative consequences and 2-sample test of proportions for prevalence of any binge drinking episode in a typical week). Text in italics represents a summary of the other categories.
| Outcome and TRAC2a exposure | Baseline | 3 months | P value | ||
| Maximum drinks on any weekend day, median (IQRb) | |||||
| None (n=5) | 6 (2-8) | 9 (2-10) | .89 | ||
| 4 weeks (n=6) | 5 (3-10) | 4 (2-7) | .29 | ||
| 8 weeks (n=8) | 5 (3-7) | 5 (3-7) | .94 | ||
| 12 weeks (n=9) | 5 (4-6) | 5 (3-8) | .6 | ||
| >12 weeks (n=9) | 6 (3-6) | 2 (1-5) | .09 | ||
| Any (n=32) | 5 (3-6) | 5 (2-7) | .31 | ||
| Any binge drinking episode in a typical week, n (%) | |||||
| None (n=5) | 2 (40) | 2 (40) | .99 | ||
| 4 weeks (n=6) | 4 (67) | 2 (33) | .32 | ||
| 8 weeks (n=8) | 3 (38) | 2 (25) | .56 | ||
| 12 weeks (n=9) | 3 (33) | 4 (44) | .65 | ||
| >12 weeks (n=9) | 4 (44) | 1 (11) | .08 | ||
| Any (n=32) | 14 (44) | 9 (28) | .19 | ||
| Number of negative consequences, median (IQR) | |||||
| None (n=5) | 9 (3-9) | 3 (0-9) | .41 | ||
| 4 weeks (n=6) | 11 (3-14) | 5 (1-7) | .4 | ||
| 8 weeks (n=8) | 9 (4-13) | 2 (0-3) | .09 | ||
| 12 weeks (n=9) | 10 (4-13) | 3 (1-6) | .009 | ||
| >12 weeks (n=9) | 6 (4-11) | 2 (0-3) | .05 | ||
| Any (n=32) | 9 (4-13) | 3 (0-6) | .004 | ||
aTRAC2: Texting to Reduce Alcohol Consumption 2.
bIQR: interquartile range.